Direct cooling plate and energy storage battery pack

Abstract

This utility model belongs to the field of energy storage device technology and discloses a direct cooling plate and an energy storage battery pack. The direct cooling plate is used to support the battery pack, which includes multiple cells connected in series or parallel. The direct cooling plate includes a first plate body with flow channels. The distribution direction of the flow channels is consistent with the width direction of the cell. The width of the cell is W mm, and the distance between adjacent flow channels is H mm. The ratio between W mm and H mm is 1.7-16. Since the direct cooling plate is directly connected to the cooling system, the flow channel arrangement can be reduced. By setting the ratio of the cell width to the distance between adjacent flow channels, the number of flow channels in contact with the cell can be limited, which can both ensure the heat dissipation effect of the cell and optimize the number of flow channels, simplifying the flow channel structure of the direct cooling plate.

Description

Technical Field

[0001] This utility model relates to the field of energy storage device technology, and in particular to a direct cooling plate and an energy storage battery pack. Background Technology

[0002] When a battery pack is in use, the multiple rows of cells inside the battery pack generate a significant amount of heat. To dissipate heat from the cells, the pack is equipped with a liquid cooling plate located below the cells. In existing technologies, an intermediate cooling plate is used between the liquid cooling plate and the cooling system. Specifically, the refrigerant in the cooling system and the cooling medium within the liquid cooling plate exchange heat within the intermediate cooling plate. Because this heat exchange method involves the coolant absorbing heat from the battery pack through the liquid cooling plate and then evaporating and exchanging heat through the intermediate cooling plate, a wide cross-sectional flow channel is required, and this channel needs to cover as much of the liquid cooling plate as possible, resulting in a relatively complex structure. Utility Model Content

[0003] In one aspect, this utility model provides a direct cooling plate that can optimize the number of flow channels and simplify the flow channel structure of the direct cooling plate.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] According to one aspect of the present invention, a direct cooling plate is provided for supporting a battery pack, the battery pack comprising multiple cells connected in series or parallel; the direct cooling plate comprises:

[0006] A first plate has multiple interconnected flow channels arranged in the same direction as the width direction of the battery cell. The width of the battery cell is W mm, and the spacing between adjacent flow channels is H mm. The ratio between W mm and H mm is 1.7-16.

[0007] According to another aspect of the present invention, an energy storage battery pack is provided, including a direct cooling plate as described above, a housing and a battery pack, wherein the direct cooling plate is disposed on the bottom plate of the housing, and the battery pack is disposed in the housing and supported on the direct cooling plate.

[0008] The beneficial effects of the above technical solution are as follows:

[0009] Since the direct cooling plate is directly connected to the cooling system, the flow channel arrangement can be reduced. By setting the ratio of the width of the battery cell to the spacing of adjacent flow channels, the number of flow channels in contact with the battery cell can be limited. This ensures the heat dissipation effect of the battery cell and optimizes the number of flow channels, simplifying the flow channel structure of the direct cooling plate. Attached Figure Description

[0010] Figure 1This is a schematic diagram of the structure of the energy storage battery pack provided in this embodiment of the utility model;

[0011] Figure 2 This is a schematic diagram of the structure of the direct cooling plate provided in this embodiment of the utility model;

[0012] Figure 3 This is a schematic diagram of the structure of the first plate in the direct cooling plate provided in this embodiment of the utility model;

[0013] Figure 4 This is a schematic diagram of the structure of the first plate in the direct cooling plate provided in this embodiment of the utility model;

[0014] Figure 5 This is a schematic diagram of the structure of the base plate assembly and the direct cooling plate provided in this embodiment of the utility model;

[0015] Figure 6 This is a bottom view of the base plate assembly and the direct cooling plate provided in this embodiment of the utility model.

[0016] In the picture:

[0017] 10. Direct cooling plate; 11. First plate; 111. First cooling zone; 1111. First flow channel; 1111a. Liquid inlet; 112. Second cooling zone; 1121. Second flow channel; 113. Third cooling zone; 1131. Third flow channel; 1131a. Liquid outlet; 1141. First reinforcing structure; 1142. Second reinforcing structure; 12. Second plate; 20. Base plate assembly; 21. Frame; 22. First reinforcing member; 23. Second reinforcing member; 24. Enclosure frame; 25. Limiting member; 30. Box cover. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0019] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0021] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0022] This utility model provides an energy storage battery pack, which serves as a power source for new energy vehicles as a rechargeable battery. The energy storage battery pack comprises a battery pack, a battery management system (BMS), a thermal management system, an electrical connection system (high-voltage / low-voltage connectors, wiring harnesses, etc.), structural components (shell, brackets, etc.), and protective components, all housed within a casing to form a complete functional unit capable of directly outputting electrical energy. The casing provides installation space for the battery pack, BMS, thermal management system, and electrical connection system, and through a reasonable structural design, fixes these components within the casing, ensuring their relatively stable position during operation and preventing damage or loosening of connections due to vibration, impact, or other factors. The casing can be made of metal materials such as steel plates or aluminum alloys, or lightweight materials such as glass fiber reinforced composite materials or carbon fiber reinforced composite materials. The battery pack stores chemical energy and controllably converts it into electrical energy. In a recyclable battery pack, the active materials can be reactivated through charging after discharge for continued use.

[0023] A battery pack is composed of multiple cells with similar capacity and internal resistance connected in series or parallel. Specifically, a battery pack includes cells and thermal insulation elements. There are multiple cells connected in series or parallel via busbars. Cells can store chemical energy and controllably convert it into electrical energy. In recyclable cells, the active materials can be reactivated by charging after discharge, allowing for continued use. Thermal insulation elements are installed between every two adjacent cells. Under certain abuse conditions, cells may experience thermal runaway, at which point the heat from one cell may spread to adjacent cells or the battery pack. This application incorporates thermal insulation elements between adjacent cells and between cells and the battery pack to prevent heat transfer between cells and between cells and the battery pack, thus preventing thermal runaway from some cells from spreading to adjacent cells or the battery pack, thereby suppressing heat propagation within the battery pack.

[0024] like Figure 1 As shown, the energy storage battery pack provided in this embodiment includes a base plate assembly 20, a direct cooling plate 10, a battery pack, and a cover 30. The base plate assembly 20 is the main load-bearing component of the battery pack, typically referring to a structural component installed at the bottom of the battery pack, used to support and fix the battery pack, battery management system, cooling system, and other components inside the battery pack. The base plate assembly 20 can be made of various materials, such as high-strength materials like aluminum alloy, steel, and stainless steel. The direct cooling plate 10 is disposed on the base plate assembly 20, and the battery pack is supported on the direct cooling plate 10. The cover 30 covers the battery pack, and the lower end of the cover 30 is connected to the base plate assembly 20. The cover 30 and the base plate assembly 20 together form the battery pack housing.

[0025] like Figures 2 to 4As shown, the direct cooling plate 10 is directly connected to the cooling system. The direct cooling plate 10 includes a first plate body 11, on which multiple interconnected flow channels are provided. The cooling system includes a compressor, a heat exchanger (condenser), a regenerator, and a cooling fan. The compressor, heat exchanger, and regenerator are connected sequentially through pipelines to form a refrigerant circulation loop. The regenerator has a first channel and a second channel. The second port of the first channel is connected to the heat exchanger, and the second port of the second channel is connected to the compressor suction port. Multiple parallel branches of the direct cooling plates 10 are connected between the first port of the first channel and the first port of the second channel of the regenerator. Each parallel branch of the direct cooling plates 10 is connected to a direct cooling plate 10 and electronic expansion valves located at the refrigerant inlet and refrigerant outlet of the direct cooling plate 10, respectively. The direct cooling plates 10 are configured one-to-one with the battery pack. During the cooling system's refrigeration process, the refrigerant is compressed into a high-temperature, high-pressure gas by the compressor, then passes through an oil separator for oil return, and then goes to the heat exchanger. There, it is condensed and cooled by a cooling fan, becoming a medium-temperature, high-pressure liquid refrigerant. This liquid refrigerant then enters the first channel of the regenerator. After further subcooling by the regenerator, it enters the flow channel of the direct-cooling plate 10 through the refrigerant inlet. The direct-cooling plate 10 then exchanges heat to cool the battery pack. Finally, it passes through the electronic expansion valve at the refrigerant outlet of the direct-cooling plate 10, where it is throttled into a low-temperature, low-pressure gas-liquid two-phase refrigerant. This gas enters the second channel of the regenerator, where it is heated back into a gaseous state. Finally, it returns to the compressor through the receiver, completing the refrigeration cycle.

[0026] In some embodiments, the arrangement direction of the multiple flow channels is consistent with the width direction of the battery cell, the width of the battery cell is W mm, the spacing between adjacent flow channels is H mm, and the ratio between W mm and H mm is 1.7-16. It should be noted that the multiple flow channels are arranged along... Figure 3 The cells are arranged at intervals along the X direction indicated in the diagram; the X direction is the arrangement direction of the multiple flow channels. When the cells are placed on the direct cooling plate, the width direction of the cells is parallel to the direction indicated by the X direction. Figure 3 The X direction is parallel to the length direction of the battery cell, and the length direction of the battery cell is parallel to the X direction. Figure 3 The Y-direction is parallel to the X-direction, which is the width direction of the cell. The cells are arranged on the flow channels, and the width of the cell spans at least one flow channel. The ratio between the width of the cell and the spacing between adjacent flow channels determines how many flow channels the cell spans. It should also be noted that the spacing H between adjacent flow channels is... Figure 4 H1, H2, or H3 are indicated in the diagram. Since the direct cooling plate 10 is directly connected to the cooling system, the flow channel arrangement can be reduced. By setting the ratio of the width of the battery cell to the spacing of adjacent flow channels, the number of flow channels in contact with the battery cell can be limited. This ensures the heat dissipation effect of the battery cell and optimizes the number of flow channels, simplifying the flow channel structure of the direct cooling plate 10.

[0027] In some embodiments, Wmm ranges from 150mm to 240mm. For example, Wmm can be 150mm, 160mm, 170mm, 180mm, 190mm, 200mm, 210mm, 220mm, 230mm, 240mm, or 250mm.

[0028] In some embodiments, the width of the flow channel is W1mm, which ranges from 9mm to 15mm. For example, W1mm can be 9mm, 10mm, 11mm, 12mm, 13mm, 14mm or 15mm, preferably 12mm.

[0029] In some embodiments, the spacing Hmm between adjacent flow channels ranges from 15mm to 90mm. For example, Hmm can be 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, 65mm, 70mm, 75mm, 80mm, 85mm, or 90mm. A larger spacing between adjacent flow channels results in fewer flow channels contacting the battery cell, while a smaller spacing results in more flow channels contacting the battery cell. Since the direct cooling plate 10 is directly connected to the cooling system, the number of flow channels does not need to be excessive. By setting the spacing Hmm between flow channels to a range of 15mm-90mm, the optimal number of flow channels can be ensured, guaranteeing both the heat dissipation effect of the battery cell and optimizing the number of flow channels.

[0030] In some embodiments, the total cross-sectional area of ​​the plurality of channels is A1m 2 The total area of ​​the side of the direct cooling plate 10 that contacts the battery pack is A2m. 2 A1m 2 With A2m 2 The ratio is 0.1-0.29, for example, A1m 2 With A2m 2 The ratio can be 0.1, 0.15, 0.2, 0.25, or 0.29, preferably 0.25. A1m 2 With A2m 2 The larger the ratio, the larger the area covered by the flow channel on the direct cooling plate 10, the more complex the flow channel structure, and the better the heat dissipation effect; A1m 2 With A2m 2 The smaller the ratio, the smaller the area covered by the flow channel on the direct cooling plate 10, the simpler the flow channel structure, and the worse the heat dissipation effect. By using A1m... 2 With A2m 2 The ratio is set to 0.1-0.29, which simplifies the flow channel structure and ensures the heat dissipation effect of the direct cooling plate 10.

[0031] In some embodiments, refer to Figure 2A2m 2 It is 1.35m 2 -1.65m 2 For example, A2m 2 It can be 1.35m 2 1.4m 2 1.45m 2 1.5m 2 1.55m 2 1.6m 2 Or 1.65m 2 A1m 2 0.15m 2 -0.4m 2 For example, A1m 2 It can be 0.15m 2 0.2m 2 0.25m 2 0.251m 2 0.3m 2 0.35m 2 or 0.4m 2 The preferred value is 0.251m. 2 .

[0032] In some embodiments, the depth of the flow channel is D mm, the thickness of the first plate 11 is T mm, and the ratio of D mm to T mm is 1.5-3.5. For example, the ratio of D mm to T mm can be 1.5, 1.8, 2.0, 2.5, 2.8, 3, or 3.5, preferably 2.8. This design ensures that the flow channel is deep enough to accommodate the cooling medium and reduces flow resistance, while also enhancing the structural strength of the direct cooling plate 10, enabling it to better withstand pressure fluctuations caused by the phase change of the medium.

[0033] In some embodiments, the depth Dmm of the flow channel is 2mm-3.5mm. For example, the depth Dmm can be 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3mm, 3.1mm, 3.2mm, 3.3mm, 3.4mm, or 3.5mm, preferably 2.8mm. In some embodiments, the thickness Tmm of the first plate 11 is 1mm-1.4mm. For example, Tmm can be 1mm, 1.1mm, 1.2mm, 1.3mm, or 1.4mm.

[0034] Along the direction of refrigerant flow, the spacing between adjacent channels gradually decreases. It's understandable that as the refrigerant flows through the channels, it carries away heat from the battery cells, causing the refrigerant temperature to gradually rise and reducing its cooling capacity. This design ensures that in areas with low refrigerant temperature, the number of channels in contact with the battery cells is reduced; as the refrigerant temperature gradually increases within the channels, the number of channels in contact with the battery cells increases, thus guaranteeing effective heat dissipation for each area of ​​the battery cell.

[0035] Reference Figure 3 and Figure 4 In some embodiments, along the refrigerant flow direction, the direct cooling plate 10 includes a first cooling zone 111, a second cooling zone 112, and a third cooling zone 113. The first cooling zone 111 includes a plurality of first flow channels 1111, the second cooling zone 112 includes a plurality of second flow channels 1121, and the third cooling zone 113 includes a plurality of third flow channels 1131. The distance between adjacent first flow channels 1111 is H1mm, the distance between adjacent second flow channels 1121 is H2mm, and the distance between adjacent third flow channels 1131 is H3mm, where H1mm > H2mm > H3mm. The larger the distance between the flow channels, the fewer flow channels the battery cell contacts; the smaller the distance between the flow channels, the more flow channels the battery cell contacts. Therefore, the number of flow channels in contact with the battery cell in the first cooling zone 111, the second cooling zone 112, and the third cooling zone 113 increases sequentially.

[0036] In some embodiments, the first cold zones 111 are arranged in pairs and symmetrically distributed about the third cold zone 113. The second cold zones 112 are arranged in pairs and symmetrically distributed about the third cold zone 113. Specifically, the third cold zone 113 is located at the middle of the first plate 11 along its width direction. Along the width direction of the first plate 11, the two first cold zones 111 are symmetrically located on both sides of the third cold zone 113, and the two second cold zones 112 are symmetrically located on both sides of the third cold zone 113. Through this design, multi-level distribution and multi-path flow are achieved, resulting in a uniform distribution of the heat dissipation medium and ensuring the overall temperature uniformity of the direct cooling plate 10.

[0037] In some embodiments, the first plate 11 has two liquid inlets 1111a and one liquid outlet 1131a. The two liquid inlets 1111a are respectively connected to two first cold zones 111, and the liquid outlet 1131a is connected to a third cold zone 113. The two liquid inlets 1111a and the liquid outlet 1131a are located on the same side. Refrigerant enters the two first cold zones 111 of the direct cooling plate 10 simultaneously through the two liquid inlets 1111a. Because the two liquid inlets 1111a and the liquid outlet 1131a are adjacent, the refrigerant flows into the two second cold zones 112 after entering the two first cold zones 111, and finally converges into the third cold zone 113 before flowing out through the liquid outlet 1131a. This achieves rapid refrigerant circulation, increases the refrigerant circulation speed, and thus increases the refrigerant's cooling speed. This refrigerant channel arrangement enables faster refrigerant circulation within the direct cooling plate 10, achieving faster cooling.

[0038] In some embodiments, at least one first flow channel 1111 is simultaneously connected to at least two second flow channels 1121, that is, at least one first flow channel 1111 is divided into at least two second flow channels 1121. In this embodiment, there are four first flow channels 1111. The first flow channels 1111 on both sides and the second flow channels 1121 on both sides are the same flow channel. The two first flow channels 1111 in the middle are divided into two second flow channels 1121 respectively, that is, there are six second flow channels 1121. In some embodiments, at least two second flow channels 1121 merge into a third flow channel 1131. This embodiment shows that in two second cooling zones 112, the outer second flow channels 1121 merge into a third flow channel 1131; in each second cooling zone 112, the inner second flow channel 1121 and two second flow channels 1121 near the inner middle merge into a third flow channel 1131; in each second cooling zone 112, the two second flow channels 1121 near the outer middle merge into a third flow channel 1131, meaning there are five third flow channels 1131. It is understood that the number of first flow channels 1111, second flow channels 1121, and third flow channels 1131, as well as the branching and merging situations, are not limited to this embodiment, as long as the spacing between adjacent first flow channels 1111, adjacent second flow channels 1121, and adjacent third flow channels 1131 gradually decreases.

[0039] Alternatively, in some embodiments, along the refrigerant flow direction, the direct cooling plate 10 includes a first cooling zone 111, a second cooling zone 112, and a third cooling zone 113. The first cooling zone 111 includes n1 first flow channels 1111, the second cooling zone 112 includes n2 second flow channels 1121, and the third cooling zone 113 includes n3 third flow channels 1131, where n1 < n2 < n3.

[0040] Furthermore, a reinforcing structure is provided on the first plate 11 to enhance its strength. In some embodiments, the reinforcing structure includes a first reinforcing structure 1141 and a second reinforcing structure 1142, with the first reinforcing structure 1141 disposed between adjacent first flow channels 1111. In some embodiments, the reinforcing structure includes a second reinforcing structure 1142 disposed between adjacent second flow channels 1121. In some embodiments, the reinforcing structure includes a first reinforcing structure 1141 and a second reinforcing structure 1142, with the first reinforcing structure 1141 disposed between adjacent first flow channels 1111 and the second reinforcing structure 1142 disposed between adjacent second flow channels 1121.

[0041] In some embodiments, the reinforcing structure is recessed at one end face of the first plate 11 where the flow channel is provided, and protrudes from the other end face of the first plate 11.

[0042] In addition, the direct cooling plate 10 also includes a second plate 12, which is connected to the side of the first plate 11 where the flow channels are located. The second plate 12 and the first plate 11 can be fixed by welding or by bolts and sealing rings, so that each channel forms a closed space to ensure that each flow channel does not interfere and has a good seal. The side of the second plate 12 that is in contact with the first plate 11 can be drawn with the same flow channels as the first plate 11, or the side of the second plate 12 that is in contact with the first plate 11 can be a smooth surface.

[0043] like Figure 5 and Figure 6 As shown, in some embodiments, the base plate assembly 20 includes a frame, and the direct cooling plate 10 is disposed on the frame. The frame includes, but is not limited to, four side frames 21, which are connected end to end. To improve the structural strength of the frame, the base plate assembly 20 also includes a first reinforcing member 22, which is located between two side frames 21 distributed along the width direction of the base plate assembly 20 and extends along the length direction of the base plate assembly 20. The two ends of the first reinforcing member 22 are respectively connected to the two side frames 21 distributed along the length direction of the base plate assembly 20. Further, the base plate assembly 20 also includes a plurality of second reinforcing members 23, which are spaced apart along the length direction of the base plate assembly 20. The two ends of each second reinforcing member 23 are respectively connected to the two side frames 21 distributed along the width direction of the base plate assembly 20, and each second reinforcing member 23 is also connected to the first reinforcing member 22. Through the above structural arrangement, both material saving and weight reduction can be ensured, while maintaining structural strength.

[0044] Furthermore, the base plate assembly 20 also includes multiple frames 24, which are connected end to end to form an enclosing space. The battery pack is located within the enclosing space, and the cover 30 is connected to the frames 24.

[0045] In some embodiments, there are multiple battery packs, all of which are disposed within an enclosing space. The multiple battery packs are spaced apart along the length of the base plate assembly 20, thereby avoiding close contact between adjacent battery packs and preventing the heat generated by adjacent battery packs from accumulating, thus preventing the battery pack from accumulating heat and causing overheating, and improving the safety of the battery pack.

[0046] In some embodiments, the base plate assembly 20 further includes a plurality of limiting members 25, which are spaced apart along the length of the base plate assembly 20. A limiting space is formed between every two adjacent limiting members 25, and each limiting space corresponds one-to-one with a battery pack. The battery pack is located within the limiting space to limit the position of the battery pack along the length of the base plate assembly 20, ensuring a certain distance between adjacent battery packs. Optionally, the limiting members 25 can be connected to the frame 24 or the direct cooling plate 10. Optionally, the limiting members 25 can be positionally adjustable to make the installation of the battery pack more flexible.

[0047] This utility model embodiment also provides an energy storage device, including a cooling system and the aforementioned energy storage battery pack. The cooling system is directly connected to the direct cooling plate 10 in the battery pack. The cooling system includes a compressor, a heat exchanger (condenser), a regenerator, and a cooling fan. The compressor, heat exchanger, and regenerator are connected sequentially through pipelines to form a refrigerant circulation loop. The regenerator has a first channel and a second channel. The second port of the first channel is connected to the heat exchanger, and the second port of the second channel is connected to the compressor suction port. Multiple parallel branches of the direct cooling plates 10 are connected between the first port of the first channel and the first port of the second channel of the regenerator. Each parallel branch of the direct cooling plate 10 is connected to a direct cooling plate 10 and electronic expansion valves located at the refrigerant inlet and refrigerant outlet of the direct cooling plate 10, respectively. The direct cooling plates 10 are configured one-to-one with the battery pack. During the cooling system's refrigeration process, the refrigerant is compressed into a high-temperature, high-pressure gas by the compressor, then passes through an oil separator for oil return, and then goes to the heat exchanger. There, it is condensed and cooled by a cooling fan, becoming a medium-temperature, high-pressure liquid refrigerant. This liquid refrigerant then enters the first channel of the regenerator. After further subcooling by the regenerator, it enters the flow channel of the direct-cooling plate 10 through the refrigerant inlet. It then undergoes heat exchange through the direct-cooling plate 10, cooling the battery pack. Finally, it passes through the electronic expansion valve at the refrigerant outlet of the direct-cooling plate 10, where it is throttled into a low-temperature, low-pressure gas-liquid two-phase refrigerant. This gas enters the second channel of the regenerator, where it is superheated into a gaseous state. Finally, it returns to the compressor through the receiver, completing the refrigeration cycle.

[0048] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A direct-cooling plate, characterized in that, For supporting a battery pack, the battery pack comprising multiple cells connected in series or parallel; the direct cooling plate (10) comprises: The first plate (11) has multiple interconnected flow channels. The arrangement direction of the multiple flow channels is consistent with the width direction of the battery cell. The width of the battery cell is W mm, the spacing between adjacent flow channels is H mm, and the ratio between W mm and H mm is 1.7-16.

2. The direct cooling plate according to claim 1, characterized in that, The Wmm range is 150mm-240mm.

3. The direct cooling plate according to claim 1, characterized in that, The width of the flow channel is W1mm, and the range of W1mm is 9mm-15mm.

4. The direct cooling plate according to claim 1, characterized in that, The range of Hmm is 15mm-90mm.

5. The direct cooling plate according to claim 1, characterized in that, The total cross-sectional area of ​​the multiple flow channels is A1m 2 The total area of ​​the side of the direct cooling plate (10) that contacts the battery pack is A2m. 2 A1m 2 With A2m 2 The ratio is 0.1-0.

29.

6. The direct cooling plate according to claim 5, characterized in that, A2m 2 It is 1.35m 2 -1.65m 2 .

7. The direct cooling plate according to claim 5, characterized in that, A1m 2 0.15m 2 -0.4m 2 .

8. The direct cooling plate according to claim 1, characterized in that, The depth of the flow channel is Dmm, and the thickness of the first plate (11) is Tmm, so the ratio of Dmm to Tmm is 1.5-3.

5.

9. The direct cooling plate according to claim 8, characterized in that, Dmm is 2mm-3.5mm.

10. The direct cooling plate according to claim 8, characterized in that, Tmm is 1mm-1.4mm.

11. The direct cooling plate according to claim 1, characterized in that, Along the direction of refrigerant flow, the distance between adjacent channels gradually decreases.

12. The direct cooling plate according to claim 11, characterized in that, Along the refrigerant flow direction, the direct cooling plate (10) includes a first cooling zone (111), a second cooling zone (112), and a third cooling zone (113). The first cooling zone (111) includes multiple first flow channels (1111), the second cooling zone (112) includes multiple second flow channels (1121), and the third cooling zone (113) includes multiple third flow channels (1131). The distance between adjacent first flow channels (1111) is H1mm, the distance between adjacent second flow channels (1121) is H2mm, and the distance between adjacent third flow channels (1131) is H3mm. Therefore, H1mm > H2mm > H3mm.

13. The direct cooling plate according to claim 12, characterized in that, The first cold zones (111) are arranged in pairs and are symmetrically distributed about the third cold zone (113).

14. The direct cooling plate according to claim 13, characterized in that, The second cold zones (112) are arranged in pairs and are symmetrically distributed about the third cold zone (113).

15. The direct cooling plate according to claim 14, characterized in that, The third cold zone (113) is located in the middle of the first plate (11) along the width direction; along the width direction of the first plate (11), the two first cold zones (111) are located on both sides of the third cold zone (113), and the two second cold zones (112) are located on both sides of the third cold zone (113).

16. The direct cooling plate according to claim 12, characterized in that, The first plate (11) is provided with a reinforcing structure, which is used to strengthen the strength of the direct cooling plate (10).

17. The direct cooling plate according to claim 16, characterized in that, The reinforcing structure is disposed between adjacent first flow channels (1111) and / or adjacent second flow channels (1121).

18. The direct cooling plate according to claim 16, characterized in that, The reinforcing structure is recessed on one end face of the first plate (11) where the flow channel is located, and protrudes from the other end face of the first plate (11).

19. The direct cooling plate according to any one of claims 1-18, characterized in that, The direct cooling plate (10) also includes a second plate (12), which is connected to one end face of the first plate (11) where a flow channel is provided.

20. An energy storage battery pack, characterized in that, The device includes the direct cooling plate (10) as described in any one of claims 1-19, and also includes a housing and a battery pack. The direct cooling plate (10) is disposed on the bottom plate of the housing, and the battery pack is disposed in the housing and supported on the direct cooling plate (10).

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